package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomerException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrdersMapper;
import com.itheima.reggie.mapper.UserMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {

    @Autowired
    private OrderDetailService orderDetailService;
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;

    @Override
    public void submit(Orders orders) {

        Long userId = BaseContext.getThreadLocal();
        LambdaQueryWrapper<ShoppingCart> queryWrapper = Wrappers.lambdaQuery(ShoppingCart.class)
                .eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(queryWrapper);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new CustomerException("购物车为空，不能下单");
        }

        Long orderId = IdWorker.getId();//生成订单号
        BigDecimal amount = new BigDecimal(0);//总金额
        User user = userService.getById(userId);//查询用户数据
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());//查询地址数据

        //组装订单明细信息
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart shoppingCart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(shoppingCart.getNumber());
            orderDetail.setDishFlavor(shoppingCart.getDishFlavor());
            orderDetail.setDishId(shoppingCart.getDishId());
            orderDetail.setSetmealId(shoppingCart.getSetmealId());
            orderDetail.setName(shoppingCart.getName());
            orderDetail.setImage(shoppingCart.getImage());
            orderDetail.setAmount(shoppingCart.getAmount());
            amount = amount.add(shoppingCart.getAmount().multiply(new BigDecimal(shoppingCart.getNumber())));
            //将orderDetail添加到集合中
            orderDetailList.add(orderDetail);
        }

        //组装订单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(amount);//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getDetail());

        //向订单表插入数据，一条数据
        this.save(orders);
        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetailList);

        //清空购物车数据
        shoppingCartService.remove(queryWrapper);
    }
}


